It appears that all of us are not getting enough sleep, especially students in Vienna, Austria, even though they sleep on average 7.5 hours per night. Strangely enough, this researcher cited Albert Einstein, who appeared to be quite a sleeper.
Gonja added highly-gifted people needed even more sleep. She cited the case of world-famous physicist Albert Einstein, who had lain in the sack 12-to15 hours a day.
I didn't know that. In all the biographies I've read about Einstein, his sleeping habit was never mentioned. Did he really sleep half of a day? No wonder he always looked like he had just gotten out of bed!! :)